Ingersoll-Rand 7120 - Manual (Page 38)

35 7/120 (P425AWIR), 9/110 (XP375AWIR), 10/105 (HP375AWIR), 14/85 (VHP300AWIR),
7/170 (P600WIR), 10/125 (HP450WIR), 14/115 (VHP400WIR)
Replenishing Supplemental Coolant
Additives (SCAs) Between Coolant Changes
NOTE: If system is to be filled with coolant that
does not contain SCAs, the coolant must be
precharged.
Through time and use, the concentration of
coolant additives is gradually depleted during
engine operation. Periodic replenishment of
inhibitors is required. The cooling system must
be recharged with additional supplemental
coolant additives available in the form of liquid
coolant conditioner.
Maintaining the correct coolant conditioner
concentration (SCAs) and freeze point is
essential in your cooling system to protect
against rust, liner pitting and corrosion, and
freeze–ups due to incorrect coolant dilution.
DO NOT mix one brand of SCA with a
different brand.
Recharge the system per instructions printed on
label of the Coolant Conditioner.
IMPORTANT: Always maintain coolant at
correct level and concentration. DO NOT
operate engine without coolant even for a
few minutes.
If frequent coolant makeup is required, the
glycol concentration should be checked to
ensure that the desired freeze point is
maintained. Follow manufacturer’s
instructions provided with Coolant/Battery
Tester.
Add the manufacturer’s recommended
concentration of supplemental coolant additive.
DO NOT add more than the recommended
amount.
The use of non–recommended supplemental
coolant additives may result in additive drop–out
and gelation of the coolant.
If other coolants are used, consult the coolant
supplier and follow the manufacturer’s
recommendation for use of supplemental
coolant additives.
Replacing Fan and Alternator Belts
Refer to CHECKING BELT TENSIONER
SPRING TENSION AND BELT WEAR in
Lubrication and Maintenance/500 Hour/12
Month Section for additional information on the
belt tensioner.
1. Inspect belts for cracks, fraying, or stretched
out areas. Replace if necessary.
2. To replace belt with automatic tensioner,
release tension on belt using a breaker bar
and socket on tension arm.
To replace belt with manual tensioner, release
tension at belt tensioner.
3. Remove poly–vee belt from pulleys and
discard belt.
4. Install new belt, making sure belt is correctly
seated in all pulley grooves. Refer to belt
routing at right for your application.
5. Apply tension to belt with tensioner. Remove
socket.
6. Start engine and check belt alignment.
Bleeding the Fuel System
Bleed the Fuel System (Engines with Electronic
Fuel Systems and Stanadyne DE10 Pump)
CAUTION: Escaping fluid under pressure
can penetrate the skin causing serious
injury. Avoid hazards by relieving pressure
before disconnec ing hydraulic or other
lines. Tighten all connections before
applying pressure. Search for leaks with a
piece of cardboard. Protect hands and body
from high pressure fluids.
Any time the fuel system has been opened up
for service (lines disconnected or filters
removed), it will be necessary to bleed air from
the system.
The fuel system may be bled at one of several
locations. Choose the best location for your
engine/machine application.
1. Loosen the air bleed vent screw two full turns
by hand on fuel filter base.
2. Operate fuel supply pump primer lever (B) or
primer button on fuel filter base (if equipped).
3. Tighten bleed plug securely, continue
operating primer until pumping action is not
felt.
4. Start engine and check for leaks.
If engine will not start, it may be necessary to
bleed air from fuel system at fuel injection pump
or injection nozzles as explained next.
At Fuel Injection Pump
1. Loosen fuel return line at fuel injection pump.
2. Operate fuel supply pump primer lever or
primer button on fuel filter base (if equipped).
3. As soon as fuel flow is free from air bubbles,
tighten fuel return line to specifications.
Primer lever is spring–loaded and will return
to normal position.
Specification
Fuel Injection Pump Return
Line—Torque 27 N
•
m (20 lb–ft)